feat:增加vant组件库

src/views/asset/list.vue

@@ -14,14 +14,13 @@
                   :key="index" :item="item"/>
     </div>
 
-    <draggable-button @click="addClick"/>
+    <van-floating-bubble icon="plus" @click="addClick" style="top: -60px;"/>
   </div>
 </template>
 
 <script setup lang="ts">
 import AssetQuery from '@/components/Asset/AssetQuery.vue'
 import AssetCard from '@/components/Asset/AssetCard.vue'
-import DraggableButton from '@/components/Common/DraggableButton.vue'
 import { useAssetStore } from '@/store/asset.ts'
 import { onMounted } from 'vue'
 import { useRouter } from 'vue-router'